This is where people confuse the law.....
Here is the law in regards to small game hunting, which yes, does indeed include coyote....
If you are hunting small game in an area where there is an
open season for deer, moose, elk, or black bear, you may
not possess or use a rifle of greater muzzle energy than 400
foot-pounds or shells loaded with ball or with shot larger than
No. 2 shot (non-toxic equivalents include steel shot larger
than triple BBB, or bismuth larger than double BB), unless
you possess a valid licence to hunt deer, moose, elk or black
bear as the case may be.
So, in other words, if you are carrying something that meets the description of "a rifle of greater than 400 foot pounds" while there is a big game season open, then you need to have a permit for that big game season. Nowhere does it state that you CANNOT use a big game rifle period. No doubt a stupid law, don't get me wrong.
As for the "270 law", here it is.....
A person hunting small game may not carry or use a rifle
of greater calibre than a .275-calibre rifle, except a muzzleloading
gun, in the geographic areas of Brant, Chatham-Kent,
Durham, Elgin, Essex, Haldimand, Halton, Hamilton, Huron,
Lambton, Middlesex, Niagara, Norfolk, Northumberland,
Oxford, Peel, Perth, Toronto, Waterloo, Wellington or York.
Yes, you cannot use greater than a .270 in these areas.... mostly around Toronto..... but to state that this rule applies to all of Ontario is incorrect.....